All of you who are getting a crash when you click on any arena in the arena list on the clipboard, try the following.
1) Navigate to your Aces High installation folder.
2) Make a copy of "aceshigh.exe" named, "bob.exe". Do not rename the original file!
3) Now, double-click on "bob.exe" and see if it allows you to get into the arena.
If it works, then problem you have is related to a firewall on your computer.